> | Lab 1.5.13.2 Router subnets review- Overview Estimated time: 30 min. Objectives: Develop a Class B addressing scheme with subnets for the 5-router lab setup Use IOS commands to configure routers to your Class B subnet scheme Assign IP Network numbers, Interfaces, IP addresses and subnet mask information for the Local Area Networks (LANS) and Wide Area Networks in use. Use the Control Panel / Network icon or winipcfg.exe utility at each workstation to verify IP address, subnet mask and default gateway settings. Use the Ping command to test the router and workstation connections. Background: This is an important lab that will demonstrate your understanding of how the Cisco lab is setup (see diagram above) and how subnetting applies to multiple routers. You will develop an addressing scheme based on a Class B network address and then subnet it to accommodate your current physical network with room for growth. You should be able to configure the routers and workstations without looking at your notes and using only the IOS help facility. The prior lab 1.2 provided an opportunity to setup the physical lab configuration. You may work in teams or 3 to 5 and while one group is configuring the router lab physical setup the other can be designing the class B addressing scheme and assigning IP address to devices. Tools / Preparation: Prior to starting this lab you will need to have the equipment for the standard 5-router lab available (routers, hubs, Switch, cables etc.). This lab assumes that you have completed the prior lab 1.2 and that the lab equipment (routers, hub, workstations etc.) are assembled and connected in the standard lab topology. Work in teams of 3 or more. Before beginning this lab you should review Chapter 1 in the Cisco Networking Academy Second-Year Companion Guide and Semester 3 On-line Chapter 1. The following resources will be required: (5) PC workstations (min.) with Windows operating system and HyperTerminal installed. (5) Cisco Routers (model 1600 series or 2500 series with IOS 11.2 or later) (4) Ethernet hubs (10BASE-T with 4 to 8 ports) (1) Ethernet switch (Cisco Catalyst 1900 or comparable). (5) serial console cables to connect workstation to router console port (with RJ-45 to DB9 converters). (3) Sets of V.35 WAN serial cables (DTE male/ DCE female) to connect from router to router. CAT5 Ethernet Cables wired straight through to connect routers and workstations to hubs and switches. AUI (DB15) to RJ-45 Ethernet transceivers (Quantity depends on the number of routers with AUI ports) to convert router AUI interfaces to 10BASE-T RJ-45 Web Site Resources: Routing basics General information on routers 2500 series routers 1600 series routers Terms and acronyms IP routing protocol IOS command summary Notes: Step 1 - Verify that all physical connections are correct. Review the standard semester 2 lab diagram in the overview section of this lab or the diagram you created in the prior lab and check all physical devices, cables and connections. Verify that the routers have been physically configured correctly. Step 2 - Develop a Class B addressing scheme. You have received a Class B network address of 172.16.0.0. This is actually a private Internet address for the 5-router network that will accommodate the eight networks your must define (5 LANs and 3 WANs). You may borrow more or less than eight bits from the host portion of the address but you must still allow for at least 100 hosts per subnet. Answer the following questions about your subnet design: Write the class B address here: How many bits did you borrow? What is your subnet mask? How many useable subnets does this allow you to create? How many hosts can each subnet have? Fill in the table below with information about the first 10 subnets (do not use the zero subnet when assigning subnets to the lab diagram)
> Subnet # | Subnet Address | Subnet Broadcast Address | Host Address Range
> 0 (not used ) | . | . | .
> 1 | . | . | .
> 2 | . | . | .
> 3 | . | . | .
> 4 | . | . | .
> 5 | . | . | .
> 6 | . | . | .
> 7 | . | . | .
> 8 | . | . | .
> 9 | . | . | .
> Step 3 - Configure the routers. Log on to the first router Lab-A. Verify that you have a good console connection from the workstation to the router and start the HyperTerminal program (Start/Programs/Accessories/Communications). Enter the password cisco if prompted to enter user mode. The prompt should be Lab-A> Enter Privileged Exec mode. Type enable at the router prompt. Enter the password of class if prompted. The prompt should now be Lab-A# Apply your IP subnet addressing scheme to the routers Decide which subnet you will use with each network and which IP address you will apply to each router interface (E0, S0 etc.) and configure the router accordingly. Use the RIP or IGRP routing protocol. Use the worksheet below to assign interface information for each of the five routers based on your subnets defined in the prior table. You may use the setup configuration utility or enter commands directly in configuration mode. You may use the IOS help facility at any time. Work in teams and try not to look at your notes. Sample configuration commands for router Lab-A can be found at the end of the answers section. Answers will vary. Fill in the table below with IP interface information for each of the five routers. Cisco Lab Class B Subnet Router IP Configuration
> Router Name | Lab-A | Lab-B | Lab-C | Lab-D | Lab-E
> Model Number |  |  |  |  |
> Interface E0 IP Address |  |  |  |  |
> Interface E0 Subnet Mask |  |  |  |  |
> Interface E1 IP Address |  |  |  |  |
> Interface E1 Subnet Mask |  |  |  |  |
> Interface S0 IP Address |  |  |  |  |
> Interface S0 Subnet Mask |  |  |  |  |
> Interface S0 Clock Rate |  |  |  |  |
> Interface S1 IP Address |  |  |  |  |
> Interface S1 Subnet Mask |  |  |  |  |
> Step 4 - Configure the workstations. Use the worksheet below to assign interface information for each workstation based on your subnets defined earlier. Be sure workstation IP addresses and default gateways are compatible with the same LAN the router Ethernet interface it on. Answers will vary. Fill in the IP addressing information for the workstations. Number the workstations on the diagram from left to right starting with the LAN attached to E1 on router Lab-A. Workstation IP address configuration (your answers may vary)
> Workstation # | Workstation IP Address | Workstation Subnet Mask | Default Gateway IP Address
> 1 (Lab-A E1) |  |  |
> 2 (Lab-A E1) |  |  |
> 3 (Lab-A E0) |  |  |
> 4 (Lab-A E0) |  |  |
> 5 (Lab-B E0) |  |  |
> 6 (Lab-B E0) |  |  |
> 7 (Lab-C E0) |  |  |
> 8 (Lab-C E0) |  |  |
> 9 (Lab-D E0) |  |  |
> 10 (Lab-E E0) |  |  |
Step 5 - Test the router lab connectivity. Ping from router to router. Begin with router Lab-A and use the console workstation connection to it. Start the HyperTerminal program and ping the S1 interface of router Lab-B. This will verify that the WAN link between Lab-A and Lab-B is OK. Ping the serial interfaces of the other routers. Lab-A> ping xxx.xxx.xxx.xxx (S1 interface of Lab-B) Was the ping from router Lab-A to Lab-B successful? Ping from workstation to router. Begin with a workstation connected to the first hub. Click Start/Programs/MS-DOS Prompt and ping the S1 interface of router Lab-B. This will verify that the workstation's IP configuration and the WAN link between Lab-A and Lab-B is OK. Ping the serial interfaces of the other routers and the IP addresses of the other workstations to verify that the network is configured properly. C:\WINDOWS> ping xxx.xxx.xxx.xxx (S1 interface of lab-B) Was the ping from router Workstation 1 to Lab-B successful?